You need to download the latest firmware (2760) from VWNavi
Burn that to disc.
To load firmware is pretty straight forward.
1. Unlock your car > Get in >
DO NOT PUT KEY IN IGNITION2. Power up the RNS-510 without key in ignition > eject any CD or DVD in the RNS-510 insert your Firmware CD
3. Unit will restart and after a couple of minutes it will ask you to press OK > wait a couple more minutes and you will get another OK to press.
4. Leave the update to run for approx 50 minutes > once it’s done eject the CD and reload maps from DVD.
Just be aware you can brick the RNS if you have a dodgy one (i.e its been opened up and the EEPROM soldered to reset the code) Only way to tell is check to see if the security seals are still intact. If they aren't then you run the risk. If they are still intact you should be ok